1313321321251 has 2 divisors, whose sum is σ = 1313321321252. Its totient is φ = 1313321321250.

The previous prime is 1313321321189. The next prime is 1313321321261. The reversal of 1313321321251 is 1521231233131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1313321321251 - 2⁹ = 1313321320739 is a prime.

It is not a weakly prime, because it can be changed into another prime (1313321321261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656660660625 + 656660660626.

It is an arithmetic number, because the mean of its divisors is an integer number (656660660626).

Almost surely, 2^{1313321321251} is an apocalyptic number.

1313321321251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313321321251 is an equidigital number, since it uses as much as digits as its factorization.

1313321321251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 28.

Adding to 1313321321251 its reverse (1521231233131), we get a palindrome (2834552554382).

The spelling of 1313321321251 in words is "one trillion, three hundred thirteen billion, three hundred twenty-one million, three hundred twenty-one thousand, two hundred fifty-one".